. >> that's how the president described the tragedy at sandy hook elementary school. will his legacy call for tougher gun laws? he called to reinstate the assault weapons ban, restrict ammunition magazines to no more than ten rounds and require background checks on all gun purchases. he also signed 23 executive actions. for the first time in years, it looks like gun legislation could happen and that immediacy is turning the fight over the president's plans very personal. he invited four children who wrote him letters, begging for an end to gun violence, invited them to join him at the white house. 8-year-old grant wrote i think there should be some changes in the law with guns. 11-year-old julia wrote even though i am not scared for my own safety, i am scared for others. i have four brothers and sisters. >> these are kids. this is what they're thinking about. and so what we should be thinking about is our responsibility to care for them. >> but the national rifle association, the nra, it got personal, too, releasing a new ad invoking the president's children. >> the p